acfortier Posted October 3, 2021 Share Posted October 3, 2021 I don't see 4 lines coming out of the prop. valve. I see 3 total lines from the picture? Also, you have a picture of the rear where it splits to each wheel, so it seems that each rear wheel isn't on its own from the prop. valve? Link to comment Share on other sites More sharing options...
ghetdjc320 Posted October 3, 2021 Share Posted October 3, 2021 1 hour ago, acfortier said: I don't see 4 lines coming out of the prop. valve. I see 3 total lines from the picture? Also, you have a picture of the rear where it splits to each wheel, so it seems that each rear wheel isn't on its own from the prop. valve? Agreed. Looks like a normal setup. To the OP: tighten your those flares or reflare if necessary and you should be good to go. Everything else looks fine. Link to comment Share on other sites More sharing options...
Whitaker717 Posted October 3, 2021 Author Share Posted October 3, 2021 Thanks guys. I am hoping that’s the case. This is the one aspect of the Comanche that I just don’t understand and it’s killing me. It’s super frustrating because it runs great. Lol Link to comment Share on other sites More sharing options...
Eagle Posted October 3, 2021 Share Posted October 3, 2021 23 hours ago, Whitaker717 said: Well I think that’s how it is. It’s in the shop so I can’t look. There are 4 lines coming out of that portioning valve. I assumed one went to each wheel. No. Check again, when you get the truck back. You should have one hard line that runs to a termination above the rear axle. From there, there should be a single rubber hose that connects to a tee fitting mounted to the axle tube. From that tee fitting there's a hard line to each rear brake cylinder. You should not have separate lines from the proportioning valve to each rear wheel. Which is what you wrote. The proportioning valve should have two lines going into it (the two on top, from the master cylinder), and three coming out of it. Here's what it looks like inside: And remember, you have a TJ (or maybe an XJ or ZJ) proportioning valve. That's very different from the stock MJ front distribution block, which looks similar on the outside but which does NOT have any proportioning function. Link to comment Share on other sites More sharing options...
Eagle Posted October 3, 2021 Share Posted October 3, 2021 Here's a better photo -- I added labels. Link to comment Share on other sites More sharing options...
Whitaker717 Posted October 3, 2021 Author Share Posted October 3, 2021 I believe you are right Eagle. I will check when I get it back. I didn’t figure the brakes on these little trucks would be so complicated. Link to comment Share on other sites More sharing options...
Whitaker717 Posted October 3, 2021 Author Share Posted October 3, 2021 Another question Eagle, are there any better flares to use or are they all the same. That’s where it seemed the fluid was coming from. Could I have caused those flares leaking somehow? Link to comment Share on other sites More sharing options...
ghetdjc320 Posted October 4, 2021 Share Posted October 4, 2021 Try tightening the fittings first. If you have to reflare you will need to make a “double” flare. The flare has to fit the shape of the seat that it will be screwed into. If you look carefully at eagles picture you will see the conical seat in each outlet/inlet of that prop valve. This is what te flare should look like when finished: Link to comment Share on other sites More sharing options...
Eagle Posted October 4, 2021 Share Posted October 4, 2021 16 hours ago, Whitaker717 said: Another question Eagle, are there any better flares to use or are they all the same. That’s where it seemed the fluid was coming from. Could I have caused those flares leaking somehow? There are two types of flares -- the SAE double flare shown in the post above, and the "bubble" flare. MJs use the SAE double flare. The brake line layout on your truck isn't any different or more complicated than what's found on 90% of vehicles built since about 1960 (or whenever the industry changed to separate circuits for the front and rear wheels). Your brake system is not stock. The OEM Comanche system, with the rear height-sensing proportioning valve, trips up a lot of people who are new to MJs. Link to comment Share on other sites More sharing options...
Whitaker717 Posted October 4, 2021 Author Share Posted October 4, 2021 Thanks for all the input guys I appreciate the help! Link to comment Share on other sites More sharing options...
Whitaker717 Posted October 14, 2021 Author Share Posted October 14, 2021 So quick update on the valve, according to the mechanic I take it to he said the fluid was leaking out of the electrical connector on the top of the valve. Has anyone ever had that happen? He said he just took out the electrical connector because he can’t find one anywhere. Is this normal. This guy is a great mechanic but man these brake issues make me nervous. Link to comment Share on other sites More sharing options...
MiNi Beast Posted October 15, 2021 Share Posted October 15, 2021 Yeah mine leaks there as well currently. I just plan to swap in a new one just so I know its been done. Good luck with yours, seems like its in good hands. 👍 Link to comment Share on other sites More sharing options...
Whitaker717 Posted October 15, 2021 Author Share Posted October 15, 2021 What does the electrical connector do? Will it hurt anything not having it in? Link to comment Share on other sites More sharing options...
cruiser54 Posted October 15, 2021 Share Posted October 15, 2021 Lights up a lamp on the dash if there is a sudden loss of pressure. Link to comment Share on other sites More sharing options...
Whitaker717 Posted October 15, 2021 Author Share Posted October 15, 2021 Does it hurt or help to eliminate it? Link to comment Share on other sites More sharing options...
MiNi Beast Posted October 15, 2021 Share Posted October 15, 2021 1 hour ago, Whitaker717 said: Does it hurt or help to eliminate it? Best to replace as is a safety issue. However, mine has been unplugged since the wire melted due to the bad sensor, which only went bad cause of the hissing sound from my brake pedal. So with a spongy pedal telling the sensor to tell me I have an issue. I don't know about you but I like to stop when I need to and I will be ensuring all my parts are replaced and in good working order before I go far. With that said, I have been driving it for about a year like that, so you could still drive it, as you have been anyways. So once it's replaced you shouldn't have to worry about it and thats peace of mind. Link to comment Share on other sites More sharing options...
Eagle Posted October 15, 2021 Share Posted October 15, 2021 2 hours ago, Whitaker717 said: Does it hurt or help to eliminate it? Technically, it's illegal. Look again at the cutaway photos I posted. If there's brake fluid coming out of the port for the warning light switch, that means one or both of the O-rings for the shuttle valve has failed. Replace the proportioning valve. Link to comment Share on other sites More sharing options...
Whitaker717 Posted October 15, 2021 Author Share Posted October 15, 2021 Can someone recommend a good one or place to buy one? Link to comment Share on other sites More sharing options...
cruiser54 Posted October 15, 2021 Share Posted October 15, 2021 Probably gonna be used only. Link to comment Share on other sites More sharing options...
Whitaker717 Posted October 15, 2021 Author Share Posted October 15, 2021 15 minutes ago, cruiser54 said: Probably gonna be used only. Can you recommend a good used one? Link to comment Share on other sites More sharing options...
cruiser54 Posted October 15, 2021 Share Posted October 15, 2021 Someone here has to have one they removed at some time. I don't think I do. I always went another route when upgrading brakes on an MJ. Link to comment Share on other sites More sharing options...
Whitaker717 Posted October 15, 2021 Author Share Posted October 15, 2021 42 minutes ago, cruiser54 said: Someone here has to have one they removed at some time. I don't think I do. I always went another route when upgrading brakes on an MJ. Thanks. I will see if anyone has a good recommendation. Link to comment Share on other sites More sharing options...
cruiser54 Posted October 15, 2021 Share Posted October 15, 2021 Who here has a used one? Link to comment Share on other sites More sharing options...
MiNi Beast Posted October 15, 2021 Share Posted October 15, 2021 51 minutes ago, cruiser54 said: Who here has a used one? I plan to hit up a local pick and pull to snag one for me, I can snag one for you if needed.. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now